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How can you know if someone is a werewolf?

Answer:
You can be absolutely certain someone is NOT a werewolf. They are entirely fictional.
Fictional werewolves have the mark of the pentagram in the palm of their hand. I can't remember if it is the right or the left.
Contributor: Jeffrey
First answer by Lazarus. Last edit by Lazarus. Contributor trust: 1075 [recommend contributor recommended]. Question popularity: 1 [recommend question].